Mountain bike
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What is the right level of mixtutre for a yamaha yz250 off road bike?



how much oil and how much petrol do i put in bike?

It's been a while since I had a dirtbike but it was always 3 ounces of 2 cycle oil per gallon of gas. It was never anything different and I had a number of different dirtbikes including a YZ. See? that guy above me says the same thing. 3 to 1 means 3 ounces of oil to 1 gallon of gas.
mix it 3 to one.
32 to 1
Jason got it right - 32 to 1
3 parts gas to 1 part oil is a little rich on the oil side.
Purchase a "ratio rite" cup. If you're using - 1 gal - 2 gal - 3 gal of gas, it gets complicated. No figuring needed.The measurements are listed on the side of the clear cup.
http://www.powersportrider.com/cgi-bin/h...
Go to - OFFROAD - Index - RATIO-RITE
The ratio you want to run is 32:1. This is NOT rocket science, a little math is all it takes. There are 128 ounces in a gallon, so you take the desired ratio and divide it into 128. 32 goes into 128 4 times, that 4 is how many ounces of oil you need per gallon of gas. So, if you buy a 16 ounce bottle of premix oil you need 4 gallons of gas to mix it at 32:1. That bike has a power valve so I would use a synthetic oil so you don't have to worry about gumming it up, and a motocycle specific oil at that.
32 to 1
32:1, or 4 ozs. of oil for every gallon of gas.
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